Embedding Related YouTube Videos May Increase Your Ranking in Google?

Talk about theories! A WebmasterWorld thread has a theory that was posted by senior member, travelin cat, who noticed that his top ranking pages tend to have related YouTube video's embedded on them. The YouTube videos are not his videos, just random videos that seem to be related to his content.

The member who posted this theory seems to not believe his findings himself. He decided to test out his theory by adding YouTube videos to 10 more random pages that previously did not have any good rankings in Google. The results were shocking:

After 15 days, the average Google visit went up just over 200% compared to the previous 15 day period on those 10 pages.

Honestly, I really don't believe it. Can it be some other change that is influencing the results? Could be and of course, I did not test this theory out myself. But it is a very new theory.